package filter;

import javax.servlet.*;
import javax.servlet.annotation.WebFilter;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

//  "/*" 的意思是拦截所有请求
@WebFilter("/*")
public class MyFilter implements Filter {
    @Override
    public void init(FilterConfig filterConfig) throws ServletException {

    }

    @Override
    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
        HttpServletRequest req=(HttpServletRequest)servletRequest;
        HttpServletResponse resp =(HttpServletResponse)servletResponse;
        req.setCharacterEncoding("UTF-8");
        resp.setCharacterEncoding("UTF-8");
        filterChain.doFilter(req,resp);
    }

    @Override
    public void destroy() {

    }
}
